A progressive group called on Republican National Committee leader Pat Rogers to step down on Friday after emails showed him telling New Mexico Gov. Susana Martinez's staff that meeting with a group of American Indians "dishonored" Gen. George Armstrong Custer, the 19th century commander who killed scores of American Indians.

"The state is going to hell," Rogers, who is a member of the GOP executive committee and is currently in Tampa for the RNC convention, wrote in a June 8 email released by Progress Now New Mexico. Former Republican gubernatorial candidate Col. Allen Weh "would not have dishonored Col Custer in this manner," he wrote.

Martinez is required by law to attend the annual state-tribal leaders summit, according to Progress Now New Mexico, which called for him to step down.

"Such a blatantly racist statement against our native people is offensive from anyone, but to come from a national GOP leader and lobbyist for some of our country's largest corporations is indefensible," Progress Now New Mexico's executive director Pat Davis said in a statement.